-- =========================================================
-- country.sql 🌍
-- 无物化视图 | 超可视提示 | 可重复执行
-- PostgreSQL 17.4+ 👍
-- =========================================================

-- 1️⃣ 开始 🚀
DO $$
BEGIN
    RAISE NOTICE '🚀============ country 部署开始 ============🚀';
END $$;

-- 2️⃣ 连接目标库
\c postgres;

-- 3️⃣ 表结构 -----------------------------------
DO $$
BEGIN
    -- country 主表
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'country') THEN
        CREATE TABLE country (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_country_updated_at
            BEFORE UPDATE ON country
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '1️⃣✅ country 主表已创建';
    ELSE
        RAISE NOTICE '1️⃣⏩ country 主表已存在，跳过';
    END IF;

    -- country_name
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'country_name') THEN
        CREATE TABLE country_name (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            country_id UUID NOT NULL,
            name VARCHAR NOT NULL,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_country_name_updated_at
            BEFORE UPDATE ON country_name
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '2️⃣✅ country_name 子表已创建';
    ELSE
        RAISE NOTICE '2️⃣⏩ country_name 子表已存在，跳过';
    END IF;

    -- country_code
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'country_code') THEN
        CREATE TABLE country_code (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            country_id UUID NOT NULL,
            code VARCHAR NOT NULL,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_country_code_updated_at
            BEFORE UPDATE ON country_code
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '3️⃣✅ country_code 子表已创建';
    ELSE
        RAISE NOTICE '3️⃣⏩ country_code 子表已存在，跳过';
    END IF;

    -- country_flag
    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'country_flag') THEN
        CREATE TABLE country_flag (
            id UUID DEFAULT gen_random_uuid() PRIMARY KEY,
            country_id UUID NOT NULL,
            flag VARCHAR NOT NULL,
            deleted BOOLEAN NOT NULL DEFAULT FALSE,
            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
        );
        CREATE TRIGGER update_country_flag_updated_at
            BEFORE UPDATE ON country_flag
            FOR EACH ROW EXECUTE FUNCTION update_data_modified_column();
        RAISE NOTICE '4️⃣✅ country_flag 子表已创建';
    ELSE
        RAISE NOTICE '4️⃣⏩ country_flag 子表已存在，跳过';
    END IF;
END $$;

-- 4️⃣ 视图 ------------------------------------
DO $$
DECLARE
    view_exists BOOLEAN;
BEGIN
    SELECT EXISTS (
        SELECT 1 FROM information_schema.views 
        WHERE table_name = 'country_info_view'
    ) INTO view_exists;

    IF view_exists THEN
        DROP VIEW country_info_view;
        RAISE NOTICE '4️⃣♻️ 已删除旧视图 country_info_view';
    END IF;

    CREATE OR REPLACE VIEW country_info_view AS
    SELECT
        u.id AS country_id,
        n.name,
        c.code,
        f.flag
    FROM country u
    LEFT JOIN country_name n ON u.id = n.country_id AND n.deleted = FALSE
    LEFT JOIN country_code c ON u.id = c.country_id AND c.deleted = FALSE
    LEFT JOIN country_flag f ON u.id = f.country_id AND f.deleted = FALSE
    WHERE u.deleted = FALSE;

    RAISE NOTICE '4️⃣✅ country_info_view 已创建/更新';
EXCEPTION
    WHEN OTHERS THEN
        RAISE NOTICE '4️⃣❌ 处理视图时发生错误: %', SQLERRM;
END $$;

-- 5️⃣ 性能索引 ------------------------------------------------
CREATE INDEX IF NOT EXISTS idx_country_name_country_id_deleted     ON country_name(country_id, deleted);
CREATE INDEX IF NOT EXISTS idx_country_code_country_id_deleted     ON country_code(country_id, deleted);
CREATE INDEX IF NOT EXISTS idx_country_flag_country_id_deleted     ON country_flag(country_id, deleted);

DO $$
BEGIN
    RAISE NOTICE '5️⃣✅ 全部索引已确保存在';
END $$;

-- 6️⃣ 完成 🎉
DO $$
BEGIN
    RAISE NOTICE '🎉============ country 部署完成 ============🎉';
END $$;